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| IEVref: | 722-02-19 | | ID: |
| Language: | en | | Status: Standard |
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| Term: | harmonic telephone ringer
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| Synonym1: | tuned telephone ringer
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| Definition: | a telephone bell which responds only to alternating current within a very narrow frequency band and which may be used for selective ringing
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| Publication date: | 1992-11 |
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